

.head h2 {
    padding: 10px 0;
    color: #333;
    font-size: 50px;
}

.head p {
    padding: 10px 0;
}

.web {
    position: relative;
}

.head {
    width: 70%;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.container img {
    width: 320px;
    height: 320px;
}

.container {
    width: 80%;
    margin: 0 auto;
    position: relative;
}

.htm {
    width: 400px;
    display: inline;
    margin: 0;
}

.htm-pic {
    display: inline-block;
    margin: 0 50px;
    width: 320px;
    height: 320px;
}

.hidden1 {
    background-color: #f61947;
    z-index: 1;
    opacity: 0;
    width: 320px;
    height: 320px;
    position: absolute;
    top: 0%;
}

.white-border {
    width: 280px;
    height: 280px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 2px white solid;
}

.htm-pic:hover .hidden1 {
    opacity: 1;
    transition: 0.4s;
}

.css {
    width: 400px;
    display: inline;
    margin: 0;
}

.js {
    width: 400px;
    display: inline;
    margin: 0;
}

.es6 {
    width: 400px;
    display: inline;
    margin: 0;
}

.react {
    width: 400px;
    display: inline;
    margin: 0;
}

.vue {
    width: 400px;
    display: inline;
    margin: 0;
}

.hidden1 p {
    color: white;
    width: 250px;
    margin: 40px;
}

.box1 {
    position: relative;
    justify-content: center;
    display: flex;
}

.box2 {
    position: relative;
    justify-content: center;
    display: flex;
}

.box3 {
    position: relative;
    justify-content: center;
    display: flex;
}

@media screen and (max-width:1000px) {
    .head h2{
        font-size: 30px;
    }
    .container {
        width: 100%;
        margin: 0 auto;
        padding: 0;
    }
    .htm-pic {
        margin: 0 auto;
    }
    .htm {
        width: 320px;
        margin: 0;
    }
    .css {
        width: 320px;
        margin: 0 ;
    }
    .box1 {
        width: 320px;
        display: flex;
        flex-direction: column;
        margin: 0px auto;
    }
    .box2 {
        display:none;
    }
    .box3 {
        display: none;
    }
    #left1 {
        top: 0%;
    }
    #right1 {
        top: 50%;
    }
    #left:hover #left1 {
        opacity: 1;
        transition: 0.4s;
    }
    #right:hover #right1 {
        opacity: 1;
        transition: 0.4s;
    }
}

@media screen and (min-width:1280px) {
    .head p {
        font-size: 20px;
    }
    .htm {
        width: 480px;
    }
    .htm-pic {
        margin: 0;
        width: 480px;
        height: 480px;
    }
    .hidden1 {
        width: 480px;
        height: 480px;
    }
    .white-border {
        width: 420px;
        height: 420px;
    }
    .css {
        width: 480px;
    }
    .js {
        width: 480px;
    }
    .es6 {
        width: 480px;
    }
    .react {
        width: 480px;
    }
    .vue {
        width: 480px;
    }
    .hidden1 p {
        width: 375px;
        margin: 60px;
        font-size: 20px;
    }
    .container img {
        width: 480px;
        height: 480px;
    }
}